Draw the graph of `y=(1-x^(2))/(1+x^(2))` and hence draw the graph of `y=cos^(-1).(1-x^(2))/(1+x^(2))`.

Explanation

To solve the problem of drawing the graphs of \( y = \frac{1 - x^2}{1 + x^2} \) and \( y = \cos^{-1} \left( \frac{1 - x^2}{1 + x^2} \right) \), we will follow a step-by-step approach.

### Step 1: Analyze the function \( y = \frac{1 - x^2}{1 + x^2} \)

1. **Determine the domain**: The function is defined for all real numbers since the denominator \( 1 + x^2 \) is never zero.

**Hint**: Check if the denominator can be zero for any real \( x \).

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